Reducing-valve and pump-governor



No. 626,594. Patented lune 6, |899.4

J. L. CHAPMAN.

REDUCING AVALVE AND PUMP GDVERNR.

(Application filed Apt. 25, 1899.)

@No Model.)

Mmm H55 mww doEPH L. CHAPMAN.

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UNrTnn STATES PATENT OFFICE.

JOSEPH L. CHAPMAN, OF HADDONFIELD, NEV JERSEY, ASSIGNOR TO THE VATSON k MCDANIEL COMPANY, OF PHILADELPHIA, PENNSYLVANIA.

REDUClNG-VALVE AND PUMP-GOVERNOR.

SPECIFICATION forming part of Letters Patent No. 626,594, dated June 6, 1899.

Application iiled April 25, 1899.

To all whom it may concern:

Beit known that l, JOSEPH L. CHAPMAN, a citizen of the United States, residing at Haddoniield, in the county of Camden and State of New Jersey, have invented certain new and useful Improvements in Reducing Valves and Pump- Governors; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the gures of reference marked thereon, which form a part of this specification.

My invention relates to the class of valves constructed to receive a high pressure and by the mechanism employed in the valve reduce it in its passage through the valve to a lower and predetermined pressure and maintain a constant lower pressure from the delivery side of the valve while receiving a varying pressure,sometimes higher, sometimes lower. l also provide an attachment to govern a pump by the same valve, having means to automatically shut oif the iiuid-pressure to the pump when the hydraulic pressure becomes excessive beyond a desired limit and again admit the duid-pressure to the pump when the hydraulic pressure has been reduced to the desired degree.

I attain the objects of myinvention by the mechanism illustrated in the accompanying drawings, in which- Figure 1 is in general a central vertical section. Fig. 2 is an elevation. Fig. 3 is a section on lines, Figs. 1 and 2. Fig. 4 is a section on line o o, Fig. l. Fig. is a view of the lower cap used when the pump-governor is detached.

Similar iigures of reference indicate similar parts in all the views.

l employ two balanced valves 1 2, each having wings 3 fitting within bored openings 4 of the inner casing 5 and having coned seats 6 ground to a iit in coned seats 7 of casing 5, and the valves are placed upon a central stem 8, which is enlarged at 9 above valve 1 and has a nut 10 below valve 2, and as valve 2 has a hub 11 at its upper part to abut valve l both valves will be secured together when the Serial No. 714,350. (No model.)

nut 10 is screwed to its seat against valve 2. The inner case 5 surrounds the valves 1'2 opposite the inlet-passage 12 of case 13 and prevents the passage of fluid-pressure when 55 the valves l 2 are seated. Opposite inlet 12 is outlet 14. Valve 1 is made to be entered through inlet 12 and between upper and lower walls 5 of the inner case, and valve 2 is inserted through the opening 15 in the-lower 6o part of case 13. Above case 13, inclosinginlet-chamber 16 and outlet-chamber 17, is a neck 18, having an internal screw-thread 19, into which is screwed neck 20 of an upper chamber 2l, the stem 8 9 passing freely 65 through the neck 2O and having an enlarged head 22 above the neck for a purpose to be further described hereinafter.

At some distance above neck 2O the chamber 2l is enlarged and an annular seat 23 is 7o formed, it being composed of a horizontal part 24 and a vertical part 25. Above `the Vertical part 25 the chamber 21 is again enlarged in diameter and forms a horizontal seat 26 and a vertical wall 27, which reaches 75 up to the top of casing 28 of chamber 21, and thereon is formed a iiange 29, to which is bolted cap 30 by bolts 3l and inclosing a top chamber 32. A neck 33 extends above the chamber 32 and has an internal screw- 8o thread 34, into which is screwed a spring-seat and stem-guide 35, which is closed at its top, except at its central part 36, and open at its bottom part. Attached to head 22 of stem 8 9 by pin 37 is a bent and bifurcated lever 85 i 38, its outer end 39 being closed and solid and having its lower face 40 and its upper face 41 rounded to bear centrally on seat 24 and be free in its movement, and its upper face 41 is rounded to bear against an annu- 9o lar ring 42, which seats on 26, freely tits into 27, and extends upward to the same distance as the top face of iiange 29. lt will be noticed that the annular ring 4.2,together with the seat 24 and vertical wall 25, forms a circular groove 95 or recess 43, extending entirelyaround the inside of case 28, and its construction is such that it can be quickly and cheaply bored and made true, the ring 42 being inserted after the other work is done, and it is also readily reloo moved whenever the top casing 30 is taken oif. Attached to bent lever 38 and embraced by pin 45.

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its bifurcated or inner end is another bent lever 44, the attachment to lever 381 being by Thereafter lever 44 is carried upwardly and clear of head 22 to a point exactly vertical above pin 37 of valve-stem 8 9,

where it is attached by pin 4G to jaws 47 of.

It is thereafter bent diaphragm stem 48. downward and passing outward has an outer end 49, having a lower rounded surface 50 resting on seat 24, and an upper rounded su rface 51 coming under annular ring 42. By referring to Fig. 3 it Ywill be seen that the outer ends 39 49 are broadened to form a firm non-tipping base where they rest in circular groove or recess 43, which extends entirely around chamber 2l. By reference to Fig. 1 it will be seenV that 'ends 39 49 of levers 38 44 are inthe same horizontal plane as pin 45, which attaches them to each other, while pins 37 46, which attach the levers 38 44 to spindles 8- 9 and 48, are vertically in the same line and equidistant from pin 45. Resting on ber-21l and under diaphragm 52.

` pin 46;

fiange 29 of case 28 is diaphragm 52, it-being hefld iny place between ange 29 of case 28 and ange 53 of upper case 30 and within bolts 3='l at its outer edge. The stem 48 has a seat 54 under the diaphragm, and a plate-55 above the diaphragm is forced to it by nut 56-on-` stem 48. The nut 56y also affords a scat for the lower end of spring 57, which is inserted inandy seated u-nder` guide and seat 35.-

Anl opening 58 in topcase-30 admits atmospheric pressure to chamber 32 and above the diaphragm 52. An openin g 59 through neck 20= allo-ws fluid-pressure to pass into cham- 'lhe opening 15,A through which valve 2 is inserted, will be closedby cap 60, Fig. 5, when the valve is usedf simply as a reducing-valve. To allow fluid-pressure to pass valves 1 2` the springsea-t and guide 35lwill' be screwed down, caus- 'ing spring 57 to presson nut 56, and thereby diaphragm 52, carryingjaws 47 of stem- 36 and By this means pin 46 will press down ben-t lever 44, which is attached by pin 45 to bentlever 38,y and owing tothe difference in the leverage from end 49, where the lever is supported to pin 46, and end 49 to-pin 45 the Vmovement of the diaphragm Will be less than 50,

the-total ofthe lever in exact ratio to the l'everage. The lever 38 also being shorter from its resting end 39 'to its-point of connection at pin 45fwith lever-44, where-it receives its movement, 'than thedistance frompin45to` pin 37, where itdelivers the movement to head 22 of stem- 8 9 of valves 1 2, it follows that the movement imparted to thediaphragm, owing to my means of compounding by the use of the'l'evers 38 44, will -beless than the movement imparted to= the valves 1 2 in exact proportion tothe differences in leverages which I. employ, and thus by my mechanism l am enabled to opeuthevalvesv to admit a desired pressure andowingto. the sensitiveness of myA mechanism maintain a constan-t pressure byl a diaphrag-mf,'wh1'ch, while very sensitive,

glate its gland 65. rlegs 66 an annular ring 68 is formed andv Will-,owing to its very slight movement,be very A lasting and durable.

My mechanism for a pump-governor is shown in Figs. 1 and 2 and is inserted 1n opening 15 by meansfof screw-thread 61, un-

ider'which a projecting flange 62 is seated against thev valve-case at G3.. Within flange 62 is a stufng-box 64, having a follower or gland 65 screwed therein. Projecting downlward from ange 62 are two legs 66, which leave two spaces 67 between them, through which to pack stufng-box 64 and manipu- At the lower end of the tapped with screw-thread 69. Into this thread isvscrewed a cylinder 70, havinga seat 7l under ring 6 8 andan-en-larged chamber 72 atits upper part, tapped at to receive a wastepipe, and at its lower part is the cylinder proper, 74', in which is inserted for close diametralvcontac'r-,but free perpendicular movement, a piston 75, the lower end of cylinder being closed by a'screw-threaded head 76, having a neck 77, tapped to receive an inletpipe from the pump. Passing freely throughan opening 78 in upper head 79 ot' cylinder 70and through gland 65 and stuffing-box 64 lis an independent rod 80, which is unatl tached to piston and valve-stem 8, free to. `be moved up by piston 75 pressing against `its.lower end or moved down by the valvefstem` pressing against its upper -end and by {itsmeans enable the piston'75 to close the n valves 1 2 when the hydraulic pressure isex- -cessive under piston 75, and so shut olf the fluid-pressure to the pump and upon the reduction of the pressure below piston 75- peri mit, valves 1 2 to reopen to produce the normal Huid-pressure in the pump.. The rod 8O being free to'move, and especially being unattached to any other moving parts, is less liable to-friction and therefore moresensitive- IOO to act than; if rigidly attached andeasier and' cheaperv toproduce, as so muchattention need not be given to perfect alinement. y

Another decided advantage of my arrangement is that by having the stufling-box 64nd fluid-pressure can4 escape from the valve-ease,

and should any leakage pass by piston 75. it

` can by no means reach the valve-chamber,

but will be carried away through overflowopening 73. 4When thevalve-is notrequired for govern-ing a pump, all of the governor attachments can readily be removed byV unscrewing them at thread 61 and cap` 60 be substituted, thus enabling a stock of valves to. be vcarried. by the manufacturer which may at a moments notice be sent outasreducingvalves or as reducing-valves and pump-governors.,

Another advantage my mechanism has is the easy and quick manner in whichA the valves may be removed from the case. By

removing capl 60 or 62, (whichever may beattached',)` togetherwith nut 110 and bolts4 31,V vall parts will readily lift out of case 28 and IIO the valves l 2 be free to be removed, saving much time, expense, and annoyance over present constructions. The head 22 of valvestem 8 9 is enlarged to present shoulders 8l to neck 2O should the attendant force spring 57 too forcibly down on diaphragm 52, thereby tending to damage it.

I claim- 1. In a reducing-valve, a casing having an inlet and an outlet opening thereto, and seated within the casing two valves in manner to open and close the passage from the inlet to the outlet, au upper ease attached to the lower case and mounted thereon and secured thereto a flexible diaphragm, a stem for the valves, a stem for the diaphragm, and interposed between the two stems a system of compound levers comprising a bentlever attached at one end to the valvc-stem and at the other end resting upon a circumferential seat formed around and within the casing, and a second bent lever attached to the diaphragmstem and above the valve-stem, .having one end attached to the bent lever of the valvestem and its opposite end resting upon the opposite side of the same circumferential seat as the lever iirst mentioned, and means above the diaphragm to force the diaphragm down and by means of the compounding by the levers aforesaid move the valves to a greater degree than the diaphragm, substantially as described.

2. In a reducing-valve, an inclosin g casin g, an opening thereto and therefrom for fluidpressure flowing, two val-ves seated therein and controlling the passage therethrough, a stem for the valves, a diaphragm seated on and secured to a chamber above the valvechamber, a stem for the diaphragm, a spring seated above the diaphragm, bearing thereon and having means for its adjustment, a bent and bifurcated lever attached at one end to the valve-stem and at its other end resting within an annular seat formed Within the casing, a bent lever attached at one end between the bifurcations of the valve-lever, and, at a point above the valve-stem, to the diaphragmstem, and at its outer end resting within the same annular seat as the valve-lever rests in, and removable means within the casing to secure t-he levers to the seats with freedom for the 4movement of the Valves and diaphragm connected thereto, substantially as set forth.

3. In a reducing-valve, a casing and means therein to seat two valves to control the iiow of fluid-pressure therethrough, a flexible diaphragm seated upon and secured to the casing, means above the diaphragm to force it downward, a stem for the valves, a stem for the diaphragm, in direct alinement, a circular recess formed within the upper casing its lower and outer sides being part of the casing; an annular ring within the upper casing and its lower face forming the upper part of the recess; a bent lever resting within the recess at its outer end, having rolling contact with the top and bottom of the recess, and at its opposite end attached to a bent lever which also rests within the recess at one end and has rolling contact therewith at the top and bottom, and at its inner end is attached to the valve-stem, and means to attach the diaphragm-stein to the first-named lever,betwee11 its ends, and above the valve-stem, substantially as described and set forth.

4. In a reducing-valve and pump-governor, a casing having inlet and outlet passages, a diaphragm attached thereto and means to put pressure thereon, valves controlling the inlet and outlet through the casing, means to con to move the valve and close it when the pis-` tonpressure is excessive, and to recede when the piston-pressure is reduced, and thereby allow the valve to reopen, substantially as described.

In testimony whereof I aflix my signature in presence of two witnesses.

JOSEPH L. CHAPMAN.

Witnesses:

JAMES WATSON, R. C. WRIGHT. 

